Pencil-sharpener.



, L. HAYANB.

PENCIL SHARPENER.

PPPPPPPPPPPPPPPPP 1:11.15, 1910. 1,008,716. Patented Nov. 14, 1911.

Zezza Hay-fg@ ATS IIN LEVI HAYNE, OF SCHENECTADY, NEW YORK, ASSIGNOR TO PIKE MANUFACTURING COMPANY, 0F PIKE, NEW HAMPSHIRE, A CORPORATION 0F NEW HAMPSHIRE.

PENCIL-sHARPENnR.

Application led December 15, 1910.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, Lnvi I-IAYNE, a citizen of the United States, and a resident of Schenectady, county of Schenectady, and State of New York, have invented certain new and useful Improvements in Pencil- Sharpeners, of which the following is a full, clear, and exact description.

This invention relates more particularly to a pencil Sharpener in which the sharpening element is in the form of a disk.l

The primary object of the invention is to provide a simple and elflcient device in which vthe sharpening element is so made that it will operate to grind or sharpen a pencil or other Vobject from .two points adjacent to each other so that a very fine point may. be obtained without the liability of breaking the lead, as is very often the case with devices of this kind as ordinarily constructed.

Another object of the invention is to provide a sharpening element which may be easily made and which may be applied to various forms of devices. Y

A further object of the invention is to provide a metallic sharpening element in which there are twor sharpening elds or zones arranged to operate upon the object from two directions and which sharpening elds are located upon the face of a disk.

Withthese and other objects in view, the invention will be hereinafter more particularly described with reference tothe accompanying drawings, which form a part of this specification, and will then be pointed out in the claims at the end of the description.

In the drawings, Figure 1 is a plan view, partly in elevation and partly broken away, of one form of device embodying my invention, showing how the sharpening element may be manually operated. Fig. 2 Ais an enlarged face view of the disk, showing a pencil heldin position to be sharpened. Fig. 3 is an enlarged transverse section, taken on the line III-III of Fig. 2; and Fig. 4 is an enlarged fragmentary section, taken on the line IV-IV of Fig. 2.

The casing 10 may have suitable means to permit it to be held to a support, and in the casing is agear 11 which is held to a shaft 12, and on this shaft 12 is a handle 13 by which the shaft 12 may be rotated. A

by a collar 17 and a nut 18 arranged on the end of the shaft 15 so as to clamp the element 16 to the collar 17 to rotate with the shaft 15.

The pencil 19 may be held in a holder or device 20 betweentwo members 21 and 22 forming an opening through which the body of the pencil may pass and said holder may be suitably arranged to hold the pencil in proper position with respect to the element 16. The pencil holder or support 20 may be in the form of a bracket having an arm 23, one end of which is angularly formed at 24, and clamping this angularly formed end to an ear or lug 25 is a bolt 26,

vwhereby on releasing'the bolt the position of the bracket 20 may be changed as well as detached if desired from the casing 10. Theparts so far described may be of the usual or of any preferred construction eX- cept so far as the element 16 is concerned.

To prevent the pencil from being broken while sharpening the same, and at the same time secure effective means for this purpose, I provide on either or both faces of the element 16 two grinding or sharpening surfaces 27 and 28. As shown the element 16 is in the form of a disk and has two concentric circular surfaces, and these grinding surfaces are on one face only thereof, that is the outer face of the disk. The grinding surface 29 comprises a plurality of grinding teeth, blades or parts 30, while the grinding surface 28 has a plurality of teeth or parts 31. The teeth 30 of the grinding surface or Zone 27 are radially arranged and may be of any desired number and of any desired length and located within the grinding surface or zone 28. The teeth or grinding parts 31 of the Zone or grinding surface 28 are substantially tangentially arranged with respect to the teeth or grinding parts 30 of the grinding surface 27, and the pencil or object to be sharpened is so held with respect to the face of the disk that the teeth 81 will cut or sharpen the pencil from the body thereof toward the point or lead, while the teeth or grinding parts 30 will grind or sharpen the 'inner point or part of the pencil from the extreme point toward the wood. This has the effect of causing the pencil to be sharpened at two distinctV parts and toward Veach other one from the body ofthe wood outwardly to- Ward the point and the other from the point toward the body of the pencil, by which means the lead of the pencil is less likely to be broken and the point may be sharpened to any desired extent.

It will be understood that the grinding velement may be variously shaped, and that the teeth while shown as cut from a metallic disk-like'object and on one side thereof, may have teeth similarly formed on the opposite face, as for example the face 32 of t-he disk, so that when one face of the disk has lost its cutting or sharpening surface, it may be reversed and the other face used.

From the foregoing, it will be seen that -simple and efficient means is provided whereby a rotary sharpening element may have two grinding surfaces on the same face coperating with each other to grind or sharpen a pencil or other object in two directions to adapt the same to provide a sharp point; that simple means is provided for operating the grinding element; that said grinding element may be of metal with cutting surfaces on either or both faces thereof; and that said element is so constructed thatit may be readily made and at the same time provide an element which is very effective in use.

Having thus described my invention, I claim a-s new and desire to secure by Letters Patent 1. In a sharpening device, a frame and a disk rotatably mounted on the frame, the disk being provided at the central portion of one face with cutting teeth extending in a substantially radial direction and terminating in a circle concentric with the axis of the disk, said face of the disk also having cutting teeth extending from said circle to its edge in a direction tangential to said circle.`

, 2. Inra sharpening device the combination'Vv of a frame, a disk rotatably mounted on the tion and terminating in a circle concentric with the axis of the disk, said face of the disk also having cutting teeth extending l tremity engaged by the radial teeth, and

the portion beyond the extremity engaged by the tangential teeth.

3. In a sharpening device, the combination of a frame, a disk rotatably mounted on the frame, the disk being provided at the central portion of one face with cutting teeth extending in a substantiallyV radial direction and terminating in a circle concentric with the axis of the disk, said Aface of the disk also having cutting teeth extending from said circle to its edge in a direction tangential to said circle, the said tangential teeth having their cutting edges facing inwardly, and the radial teeth having their cutting edges extending in the same direction as the other teeth, whereby on rotation of the disk in a direction the same as that in which the tangential teeth extend such teeth will cut by an inward movement while the other teeth will cut by a movement in the opposite direction. Y

4:. In a sharpening device the combination of a frame, a disk rotatably mounted on the frame, the disk being provided at the central portion of one face with cutting teeth extending in a substantially radial lteeth will cut by an inward movement while the other teeth will cut by a movement in the opposite direction, and a holder arranged to support a pencil to have its extremity engaged by the radial teeth, and the portion beyond the extremity engaged by the outer teeth.

5. In a sharpening device, a cutting element provided with two cutting portions provided with teeth, the outer extremities of the teeth of one cutting portion terminating in a circle, the teeth of the other portion extending tangentially to the circle formed by the teeth of the rst mentioned portion 6. In a sharpening device, a cutting element provided with two cutting portions provided with teeth, the outer extremities of the teeth ofone cutting portion terminating in a circle, the teeth of the other portion extendingv tangentially to the circle formed by the teeth of the first mentioned portion, l.1nd a holder arranged to support other portion extending at en angle to seid` 10 a pencil to have its extremity engaged by teeth one set of teeth and the portion beyond the This specioation signed and witnessed extlremity engged bfy thellother or tangenthis 14th day of December A. D. 1910. tia y arrange set o teet 7. In a sharpening device, a.- cutting ele- LEVI HAYNE' ment provided with two cutting portions, Witnesses: the teeth of one cutting portion extending W. A. TOWNER, Jr., in a. radial direction, and the teeth of the C. BARTELS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

` Washington, D. C. 

